polk County Bridge Inspections
Florida Bridge Information - Polk County
Sr 37 - N Fork Alafia River
| Florida State Bridge Inspections |
|---|
| Health Index 1 | Sufficiency Rating 2 |
|---|
| 70.1 |
29.8 |
| National Bridge Inventory Rating |
|---|
| Structurally Deficient |
The term "structurally deficient" means that the department believes a bridge should undergo a series of repairs or replacement within the next six years. The department's policy is to repair or replace all the structurally deficient state owned bridges during that time. The department also recommends that local governments follow the same schedule for their structurally deficient bridges.
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| Bridge Information |
|---|
| Structure Status: | Open, no restriction |
| County: | Polk County |
| Owner: | State Highway Agency |
Maintenance Responsibility: | State Highway Agency |
| Roadway: | Sr 37 |
Facility Crossed: | North Fork Alafia River |
| Year Built: | 1951 |
| Average Daily Traffic - State: | 11,100 |
| Average Daily Traffic - NBI: | 12,200 |
| Average Daily Truck Traffic - NBI: | 2074.0 (17 % of NBI Average Daily Traffic) |
| Future Average Daily Traffic - NBI: | 21,167 in year 2027 |
| Bypass, Detour Length: | 6.2 mile |
| Toll System: | On free road. The structure is toll-free and carries a toll-free highway. |
| Functional Classification: | Expressways - Minor Arterial |
| Type of Service On the Structure: | Highway-pedestrian |
| Lanes On the Structure: | 2 |
| Vertical Clearance Over Bridge Roadway: | No restriction exists |
| Type of Service Under the Structure: | Waterway |
| Lanes Under the Structure: | 0 |
| Vertical Clearance Under Bridge Roadway: | Feature not a highway or railroad |
| Historical Significance: | Bridge is not eligible for the National Register of Historic Places. |
| Last Inspection - State: | May 20, 2010 |
| Last Inspection - NBI: | May, 2005 |
| Designated Inspection Frequency (NBI): | Every 24 Months |
| National Bridge Inventory Safety Feature |
|---|
| Bridge Median: | No median |
| Bridge Railings: | Inspected feature does not meet currently acceptable standards or a safety feature is required and none is provided. |
| Transitions: | Inspected feature does not meet currently acceptable standards or a safety feature is required and none is provided. |
| Approach Guardrail: | Inspected feature meets currently acceptable standards. |
| Approach Guardrail Ends: | Inspected feature does not meet currently acceptable standards or a safety feature is required and none is provided. |
| National Bridge Inventory Condition Ratings |
|---|
| Deck: | GOOD CONDITION - some minor problems. |
| Superstructure: | GOOD CONDITION - some minor problems. |
| Substructure: | FAIR CONDITION - all primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and Channel Protection: | Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. |
| Culverts: | Not applicable. Use if structure is not a culvert. |
| National Bridge Inventory Operating Ratings: Load Factor (LF) - 35.4 tons |
| National Bridge Inventory Ratings: Load Factor (LF) - 21.8 tons |
| National Bridge Inventory Appraisal Ratings |
|---|
| Structural Evaluation: | 5 - Somewhat better than minimum adequacy to tolerate being left in place as is |
| Deck Geometry : | 4 - Meets minimum tolerable limits to be left in place as is |
| Underclear, Vertical & Horizontal : | N - Not applicable |
| Waterway Adequacy : | 8 - Equal to present desirable criteria |
| Approach Roadway Alignment : | 7 - Better than present minimum criteria |
| Critical Feature Inspection |
|---|
| Fracture Critical Details: N |
| Underwater Inspection: N |
| Other Special Inspection: N |
1. The "health index" is a tool that measures the overall condition of a bridge. The health index typically includes about 10 to 12 different elements that are evaluated by the department. A lower health index means that more work would be required to improve the bridge to an ideal condition. A health index below 85 generally indicates that some repairs are needed, although it doesn't mean the bridge is unsafe. A low health index may also indicate that it would be more economical to replace the bridge than to repair it.
2. The "sufficiency rating" is a tool that is used to help determine whether a bridge that is structurally deficient or functionally obsolete should be repaired or just replaced. The sufficiency rating considers a number of factors, only about half of which relate to the condition of the bridge itself. The sufficiency ratings for bridges are part of a formula used by the Federal Highway Administration when it allocates federal funds to the states for bridge replacement.
Source: Office of Maintenance, Florida Department of Transportation (Last Update: January, 2010) & U.S. Department of Transportation